How do you speak to Sensei on club penguin?

Sensei is the name of a mascot on Club Penguin. He is the teacher of the card-jitsu trainees (ninjas) and a master of all element card jitsu. He sometimes comes online on club penguin to personally see how his students are working. All places on club penguin, like the town, plaza, Pizza parlour, are called the rooms of club penguin. So bascially, you have to be in the same server, same room, at the same time as Sensei on club penguin.